In the Fig.5.4, we have AB = BC, BX = BY. Show that AX = CY.
We, have AB =AC …(i)
and BX=BY …(ii)
According to Euclid’s axiom, if equals are subtracted from equasl, the remainders are equal.
So, on subtracting Eq.(ii) from (i) ,
We get, AB-BX = BC-BY
⇒ AX = CY [from figure]